Is it there? It should be if it was working. It looks like a daughtercard with a screw going through it...And 4 large ic's on top that card plugs into the socket at q13.
Pull em all, clean and reseat em.
Adapt off/on is a feature to ramp/and or decrease difficulty throughout the game. Has nothing to do with game function.
Well, this board is original and doesn't have a daughter card. The quad pokey is soldered into
the board. Look at the attached pic, lower left. It's the 4 blobs of black. Any replacment for
this?
Those quad pokeys are hard to find. There is an adapter card that uses much more plentiful pokeys. Called the quad pokey eliminator board. I believe there were also some repro eliminator boards made before too.